Fountain-pen assembling



Nov. 12, 1929. J, c. WAHL FOUNTAIN PEN ASSEMBLING Filed Sept. 13, 1924 ggg/305.2,... e

Patented Nov. 12, 1929 UNITED sierras iurriazlvrY oi-"FicE JOHN O. WAHL, F CHICAGO, ILLINOIS, ASSIGNOR T0 THE WAHL COMPANY, OI CHICAGO, ILLINOIS, A. CORPORATION OF DELAWARE FOUNTAIN-PEN ASSEMBLING Application led September 13, 1924. Serial No. 737,540;

This invention relates to a novel means for manufacturing fountain pens so that the feed member with the nib assembled in proper p0- sition thereon can be readily attached and detached from the pen section of the fountain pen so as to provide interchangeable units.

Heretofore in the manufacture of fountain pens, it has been customary permanently' to assemble the nibs in proper writing position 1o upon the feed member and then permanently to mount the assembled nib and feed member in the pen section of the fountain pen barrel. It was deemed necessary to assemble thecompleted pen at the factory because of the re` quired nicety of adjustment of the nib on the feed member of the fountain pen. However, in the retailing of fountain pens it frequently happens that a prospective purchaser desires a pen with a type of nib diiferent from that which is assembled on any particular barrel which happens to suit his fancy.

Heretofore, it has been necessary to maintain in stock a large assortment and variety of fountain pens because of the demand for different barrel designs and nibs.

In an application filed by Charles J. Funk August 14, 1924, Serial No. 731,896, and assigned to The Wahl Company, the assignee of the present invention, a construction is disclosed for overcoming this objectionable bu rden. This construction contemplates the assembling of the feed member and`nib of the fountain pen at the factory and constructing them so that they can be interchangeably counected to the pen section of any particular design of pen barrel, so that when a prospective customer does not desire the ty e of nib mounted in a particular pen barre it is a simple matter for the `salesman quickly to detach the feed member and assembled nib from the fountain pen barrel and vreplace it with an assembled unit which includes Aa nib suitable to the needs of the purchaser. In this Funk construction, the feed member is provided with a sleeve adapted to be slidably` positioned thereon, and this sleeve is formed with any desired construction of a seat for the reception of the shank of the In this manner the pen nib can be adjustably positioned on the feed member by the sllled band is provided -provide an improved sleeve en nib.'

operator. For holding the pen nib in such adjusted position, an additional sleeve or which slips over the first mentioned sleeve, pen nib and feed member, and this band is formed with a tapered portion which provides a seat or a Wedging sur-.

face to hold the pen nib in its adiustably assembled position on the feed member. To cooperate with this seat, the inner wall of the open end of the pen section is formed with a friction seat adapted to receive the assembled feed member, pen nib and the two sleeves, so that when these members are inserted in the pen section, the tapered outer sleeve frictionally binds against this seat and forms a liquid-tight joint, sufficiently tight to constitute a permanent mounting of the feed member in the pen section if desirable. On the other hand this friction fit joint is suiiiciently loose so that the feed member with the nib attached can be detached from the pen section by a slight twist and pull on the feed member.

The present invention relates to certain improvementsy in construction of the means for detachably mounting the feed member and pen nib as an assembly in the pen section of the fountain penbarrel. And among the objects of my invention .are to provide the feed member and nib assembly with means interconnectibly cooperating with the pen section of the fountain pen barrel for positively seating and unseating the feed member in the pen section; for roviding the pen section with a properly ormed liquid-tight seat, and the feed member assembly with a cooperative seat, together with interconnectible means on the feed member and pen section for positively seatingand unseating the feed member assembly and en section; to or maintaining the pen nibin adj ustably positioned relation to the feed member and provided with a tapered portion. constructed to form a friction seat with the inner wall of the pen section; these and other objects of the invention will be more readily apparent from a perusal of the following specification when taken in connection i with the accompanying drawings wherein:-

`Figure 1 is a side elevation of my improved ably this tapered portion pen, the bottom portion of the .pen being shown in section.

Figure 2 is a sim'lar view taken at right angles to Figure 1. y y

And, Figure 3 is a grouped detailed, perspective view of the feed member, the two sleeves and the .pen nib.

Referring now to the drawings in detail, the fountain pen comprises a barrel member 1, suitably threaded at end 2 to receive corresponding threads on the inner end vof the pensotion A3. The pen sectionY is preferably somewhat channeled out at its open end to4 provide a suiiciently large recess for the reeeption of the feed member and assembled nib as will be morelfully hereinafter referred to. The end of this pen section is slightly fiared as at 6 to form a seat, which in connection with the inner section wall 5, serves to form a frictional liquid-tight connection adapted to maintain the feed member and assembled nib in writing position in the pen section.

The feed member 4 is of any desired construction. In order to position the pen nib thereon, the nib is provided with 'a shank 8 having the sides of the shank partly cut away to form the shoulders-11. As in the prior mentioned Funk construction a sleeve 9 is provided with a cut-away portion 10 adapted to exactly receive the shank 8 of the pen nib 7 so that when the sleeve 9 is slid therealong to proper posit'on with the pen nib therein it will be a very simple matter to properly hold the feed mem er. The sleeve or band 12 is utilized for holding the pen nib and sleeve 9 in such assembled position on the feed member 4.l This sleeve member 12 is of requisite. inner diameter to frictionally it over sleeve 9 and hold the latter in properly assembled or adjusted position on f the feed member 4 and relative to the pointed end thereof. In lieu of providing thesleeve 12 with a continuous taper as in the before mentioned Funk application, it is herein proposed to provide the sleeve with a restricted tapered portion 13 disposed at or near the end thereof. Prefer- 13 is slightlyspaced away from the end soas to provide the larger diametered end 14. This tapered portion 13 forms a wedging seat which cooperates with the flared seat 6 on theouter end of the inner wall of the pen section 3.. In this way a liquid-tight friction fit is provided between the feed member and the pen section.

In the hereinbefore mentioned .Funk construction, considerable diiiiculty was experienced some time in extracting or quickly detaching the feed member and assembled nib, from the pen section. This was due to the fact that the sleeve member was formed with the continuous taper so that when the sleeve member was once wedged in position it was not 'so easily extracted. In the present mvenf ppn nib relative to the end of the tion this objection is overcome by limiting the taper to a restricted zone and in providing the feed member and barrel with cooperative, interconnectible means for positively seating and unseating the feed member and the pen section. A simple means, illustrated, consists in providing the end of the feed member 4 with a thread 15 adapted to engage with a corresponding female thread 16 formed on the inner end of the pen section 3. So that when it is necessary to assemble a feed member and nib in the pen section it can be quickly done by screwing the feed member into the pen section until the threads engage and function to positively draw the tapered portion 13, formed on the sleeve 12 into wedging,

friction tight contact with the flared seat 6 on the inner wall yunscrewing the feed member from the pen section.

It must be evident that the invention herein described is not limited to the specific details of construction inasmuch as it may be desirable to provide other embodiments of the generic invention.

Having thus claim:

1. In combination with a pen section of a fountain pen having a seat, a feed member, a nib, a sleeve for positioning said nib on said feed member and constituting a cooperative seat carried by said feed member adapted to tightly fit the seat I.of said pen section, and means for causing the engagement of the seat portions of said pen section and 4feed members.

2. In combination .with a fountain pen having a pen section provided with a seat, a feed member, a nib, a sleeve for positioning the nib on said feed member independently of the pen section, said feed member carrying a cooperative seat adapted to tightly engagel the seat of said pen section and detachably interconnect-ible means on said pen section and feed member for causing the seating or unseating ofthe seat portions of said pen described my invention, I

a sleeve having a tapered portion/for assembfor causin l having a pen section ling said nib on said feed member, the outer surface of 'said `tapered portion forming a cooperative seat adapted to tightly engage the seat of said pen section, and threaded means on said pen section and feed member the tight engagement .or detachmentI of sald seats.

6. In combination with a fountain pen section having a beveled seat at its open end, and a threaded portion on`its inner wall, a feed member havin a thread engaging the thread of the inner wa l, a nib, means for assembling said nib on said feed member, said means including a sleeve having a tapered portion adapted to frictionally engage the beveled seat of said pen section.

7. In combination with a fountain pen having a pen section provided with a seat, a feed member, a nib, separate means for ymounting said nib on said feed member, said mounting means forming a cooperative-seat adapted to tightly engage the seat of said pen section, and means forming a part of said pen structure for causing theengagement and sparation of said seats.

8. In combination with a fountain pen hav-- ing a pen section provided with a seat, a feed member, a nib, a tapered sleeve'for mounting said nib on said feed member, said sleeve forming a cooperative seat adapted to tightly engage the seatpof said pen section, said feed member and pen section having threaded means for causing the engagement or detachment of said seats.

9. In combination with a fountain pen provided with a tapered seat, a feed member, a nib, a sleeve having a portion of uniform diameter and a short tapered portion, said tapered portion forming a cooperative seat adapted to tightly engage the tapered seat of said pen section, said pen section and feed member havingengageable threads for permittin the tight engagement or detachment of sai seats.

10. In a fountain pen having a pen section formed with an internal, tapered seat at the end of the section, a feed bar, a nib thereon', a sleeve holding said nib on the feed bar, said sleeve having a relatively long portion of uniform diameter, portion and an end portion of uniform diameter, said feedy bar having its inner end threaded to engage threads within the pen a relatively short Haring section to draw the tapered portion of the sleeve on the bar tightly against the tapered seat on the pen section.

11. In a fountain pen, a pen section having an internal thread and a seat portion, a feed bar having a cooperative thread, a nib, means assembling the nib on the feed bar While said feed bar is detached from the pen section, said means cooperating with the pen section when the feed bar is assembled to the pen section by screwing the interengaging threads of each, and having a tapered portion cooperable with said seat portion for forming a tight t between the feed bar and the pen section yet permitting ready detachment of the feed bar and pen section.

12. In combination with a fountain pen' having a pen section provided with a .tapered seat, a feed member, a nib, a sleeve having a portion of uniform diameter and a short tapered portion,'said tapered portion forming a cooperative seat adapted to tightly engage the tapered seat of said JOHN C. WAHL.

the engagement or detachment pen section, and means on s a1d pen sectlon and feed member 

